Woo Audio WA3 Manuel utilisateur

WOO AUDIO WA3

Stereo Headphone Amplifier

Single-Ended OTL, Class A Vacuum Tube Headphone & re Amplifier

Owner’s Manual

Please review this manual before operating your WOO AUDIO™ product.

Important afety Information

CAUTION: These amplifiers are shipped without the vacuum

tubes installed. It is necessary to install the tubes first. The tubes

must be installed correctly or serious damage that is not covered

by the warranty will result.

Turn off immediately in the event of malfunction

Should you notice smoke or an unusual smell coming from the

equipments, turn it off immediately. Continued operation could

result in injury.

Do not disassemble

High voltage circuit. Touching the product’s internal parts could

result in injury. In the event of malfunction, the product should be

repaired only by a qualified technician.

Keep out of children

Failure to observe this precaution could result in injury

WARNING: Failure to follow these instructions could result in

fire, electric shock, or other injury or damage.

Table of Contents

IMPORTANT AFETY INFORMATION 2

TABLE OF CONTENT 3

OVERVIEW 4

QUICK IN TALLATION 5

OPERATION 9

COMPATIBLE TUBE 11

FAQ - FREQUENTLY A KED QUE TION 12

WARRANTY AND ERVICE 13

REVIEW 14

PRODUCT PECIFICATION 15

Overview

Thank you for choosing a Woo Audio product. The WA3 is finely hand-crafted amplifier

that delivers uncompromised performance and superior listening experience.

oint-to- oint wiring

One 6AS7 / 6080 [ DF] power tube

Two 6922 / 6DJ8 [ DF] drive tubes

One RCA input

One pre-amplifier output

¼" stereo headphone jack

Full aluminum die-cast chassis, anodized finish

Whole aluminum volume knob and power switch button

80 watts specially made toroidal transformer

Gold-pin tube sockets

Gold-plate RCA

Alps potentiometer and power switch

Rubycon and WIMA capacitors

Dale and Vishay high precision resistors

Teflon wires

Quick Installation

What’s in the box?

①

WA3 amplifier

②

One matched pair of 6922/E88CC/6DJ8 driver tubes

③

One 6080 power tube

The actual tubes may look different.

Compatible tubes may be included instead of the ones illustrated above.

ower cord and interconnection cable are not included.

Installing the power tubes:

Note: avoid oil or smudge on the tube glass; clean hands before installation.

1. Find the correct tube for the socket. There is a label below each tube socket that

indicates a standard tube for the amplifier. For example, a 6080 tube should

install on the “6080” labeling socket. You MUST use the compatible tube or

serious damage may occur to the amplifier. See Compatible Tube section for all

the approved direct substitute tubes.

2. Align the tube guide pin to the socket as below.

3. Hold the tube base firmly then squeeze it into the socket slowly. Be sure to apply

force perpendicular to the tube socket; never insert the tube at an angle. Apply

slight rocking motion for the tube, which is harder to insert; never apply circular

motion. Apply pressure from the top of the tube if needed.

Tube socket guide pin indicator

Guide pin shows on the

bottom of a tube.

Do no insert a tube at an angle

Insert a tube perpendicular to

the socket.

Hold base firmly.





4. Check installation. The tube pins should be inserted fully into the tube socket

receptacles.

Installing driver and rectifier tubes:

electing AC voltage:

WARNING: failure to select the correct voltage will result in damage of the amp.





Switch to label “115” for

AC100 to 125V voltage.

Switch to label “230” for

AC210 to 240V voltage.

Insert the tube perpendicular

to the socket

Use both hands if needed

Bottom of the tube

Align the tube to the socket

Installing the power cord:

lug the power cord into the AC inlet. See ① in the below diagram. The AC inlet socket is a

standard IEC type. You will need to obtain the correct type for your region.

Installing the source input:

lug the RCA interconnection cable into the RCA connectors; see

④

in the below diagram.

Back panel diagram:

①

AC voltage selection switch

②

AC inlet

③

RCA pre-amp output. This is an optional feature.

④

RCA input

U.S.

European

U.K.

Operation

DO NOT

oTurn on the amp before properly installing ALL tubes.

oUse tubes that are not approved by Woo Audio.

oTurn on the equipment without checking the correct AC voltage setting.

oRemove any tubes or the DC cord while the amp is operating

oTouch tubes (extremely hot) after warm-up.

oLeave the amps running unattended. To use the amps safely, please allow it to

cool down for every 8 hours of continuous play time.

olace the amp away from any wireless or frequency-emitting devices such as

mobile phones, DAs and radios, to avoid noise interference.

oKeep away from water or excessive moisture.

oTurn off the amp if its sound is abnormal.

oAllow a minimum of 2 inches of air clearance for heat dissipation.

oAllow approximately 5 minutes of warm-up.

oAllow the tubes to cool down before replacing them.

Turning the amplifier on:

1. Turn the volume knob to the lowest position.

2. Insert a headphone into phone jack ①.

3. ress the power switch ③ to a locking position. The LED will light.

4. Observe that all tubes light gradually.

5. Let the tubes warm up for at least 1 minute before turning up the volume.

Front panel diagram:

① Headphone output

② Volume control

③ ower switch

④ ower LED indicator

Break-in period:

It is recommended to allow the amplifier to operate 150+ hours so that peak performance can be

realized. An effective way to break-in the amp is to run the amp normally with music playing.

Please do not leave the amp running continuously.

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